| 摘要 |
PURPOSE:To prevent the occurrence of hunting by supplying operational oil pressure corresponding to a number of revolution difference when an engine load is below a given value, and preset operational oil pressure when the given value is larger respectively in the slip engagement condition of a lock-up clutch. CONSTITUTION:When an engine load detected by a load detection means D has below a given value in the slip engagement condition of the lock-up clutch of an automatic transmission, operational oil pressure corresponding to the number of revolution difference of the input and output element of a torque convertor detected by a number of revolution difference detection means A is supplied to a lock-up clutch via an oil pressure supply means B by an oil pressure control means C. On the other hand, when the engine load has a given value or more, the preset operational oil pressure is supplied to the lock-up clutch. Thus an engine revolution can be smoothly risen without the occurrence of hunting. |
